Hi to all,
Atmel Studio is too heavy for my computer, so I am searching a simpler and lighter IDE to develop applications.
On web I found one that could be suitable, but it generates an .elf file instead of a .bin one.
How can I convert it to a bin one?
Can you suggest some compiler?

Converting from .elf to .bin can be done using "objcopy", which is included with any GNU compiler.
Have a look at the options for "objcopy" and you should be able to figure out the command-line for conversion from .elf to .bin. To see the command-line options for "objcopy" simply run the tool without any parameters and it will give you an overview of all parameters.